JP2011101278A - Diaphragm unit, and speaker device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "diaphragm unit" with high strength and high radiation effect without especially enlarging the thickness, and to provide a "speaker device" using the unit. <P>SOLUTION: The diaphragm unit 10 where a planar voice coil 13 to become a spiral wiring pattern is formed on the front surface of a flexible base material 11 includes: an outer terminal 15 continuously formed from the outer wiring end 132 of the spiral wiring pattern 13; and an extension part 14 which is continuously formed from the inner wiring end 133 of the spiral wiring pattern 13 and has an area larger than that of the outer terminal 15. The speaker device includes the above diaphragm unit 10 and a magnetic circuit 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a diaphragm unit in which a planar voice coil serving as a spiral wiring pattern is formed on the surface of a flexible substrate, and a speaker device using the diaphragm unit.

  Conventionally, the planar voice coil of a diaphragm unit in which a planar voice coil serving as a spiral wiring pattern is formed on the surface of a flexible substrate is arranged in a magnetic gap of a magnetic circuit composed of a magnet and a yoke plate. Then, a speaker device is proposed in which the diaphragm unit is vibrated by the interaction between the magnetic field from the magnetic circuit and the audio signal current supplied to the planar voice coil (see, for example, Patent Document 1). . Such a speaker device can be made thinner than a speaker device using a cylindrical voice coil and a cone-shaped diaphragm.

JP 2000-59884 A

  However, in the conventional speaker device using the diaphragm unit in which the planar voice coil is formed, in order to increase the output, it is necessary to increase the thickness of the flexible base material in order to increase the mechanical strength. When the flexible base material on which the planar voice coil is formed is thickened, it is necessary to form a wide magnetic gap. If the magnetic gap is formed wide, the strength of the magnetic field acting on the planar voice coil is reduced, so that the magnetic circuit must be enlarged, and the overall thinning of the speaker device is impaired.

  Further, in order to reduce the temperature rise of the planar voice coil due to an increase in output, if each wiring of the spiral wiring pattern is thickened, the magnetic gap must be widened, and the same problem as described above arises.

  This invention is made | formed in view of such a situation, and provides a diaphragm unit with higher intensity | strength and a higher thermal radiation effect, without enlarging thickness especially.

  The present invention also provides a speaker device using such a diaphragm unit.

  The diaphragm unit according to the present invention is a diaphragm unit in which a planar voice coil serving as a spiral wiring pattern is formed on the surface of a flexible substrate, and is formed following the outer wiring end of the spiral wiring pattern. The outer terminal portion is formed, and the extended portion is formed subsequent to the inner wiring end of the spiral wiring pattern and has an area larger than the area of the outer terminal portion.

  With such a configuration, an extended portion wider than the outer terminal portion continuing from the outer wiring end of the spiral wiring pattern of the planar voice coil is formed so as to continue from the inner wiring end of the spiral wiring pattern. The extension portion reinforces the planar voice coil and can effectively dissipate heat generated in the planar voice coil having the spiral wiring pattern.

  The diaphragm unit according to the present invention is a diaphragm unit in which a planar voice coil serving as a spiral wiring pattern is formed on the surface of a flexible substrate, and is formed following the outer wiring end of the spiral wiring pattern. And an extended portion formed subsequent to the inner wiring end of the spiral wiring pattern, and the extended portion is disposed in the innermost region of the spiral wiring pattern, In the region, the area of the extended portion is larger than the area of the other portions.

  With such a configuration, the extended portion formed following the inner wiring end of the spiral wiring pattern in the innermost region of the spiral wiring pattern of the planar voice coil is wider than the other portions in the innermost region. The flat voice coil is reinforced by the relatively wide extension portion, and heat generated in the flat voice coil having the spiral wiring pattern can be effectively dissipated.

  The extended portion formed subsequent to the inner wiring end of the spiral wiring pattern of the planar voice coil can be an inner terminal portion that is paired with the outer terminal portion of the planar voice coil.

  Further, in the diaphragm unit according to the present invention, the gap between the extension portion and the innermost wiring surrounding the innermost region of the spiral wiring pattern is substantially the same as the line width in the spiral wiring pattern. It can be.

  With such a configuration, the innermost area of the spiral wiring pattern of the planar voice coil is substantially occupied by the extended portion, so that the wider voice extending from the inner wiring end of the spiral wiring pattern causes the planar voice coil to In addition, the heat generated by the planar voice coil having the spiral wiring pattern can be effectively dissipated.

  The diaphragm unit according to the present invention is a diaphragm unit in which a planar voice coil is formed on the surface of a flexible substrate, and the planar voice coil is formed on one surface of the flexible substrate. A first spiral wiring pattern and a second spiral wiring pattern formed on the other surface of the flexible substrate, and formed following the outer wiring end of the first spiral wiring pattern. A first outer terminal portion, a first extension formed following the inner wiring end of the first spiral wiring pattern, and a second outer portion formed following the outer wiring end of the second spiral wiring pattern. A terminal portion and a second extended portion formed subsequent to the inner wiring end of the second spiral wiring pattern, the first spiral wiring pattern and the second spiral wiring pattern being a wiring portion And the part between the lines face each other with the flexible base material in between The arranged configuration.

  With such a configuration, the first spiral wiring pattern and the second spiral wiring pattern formed on both surfaces of the flexible substrate face each other with the wiring portion and the line-to-line portion sandwiching the flexible substrate. Therefore, the portions that are heated from both surfaces of the flexible substrate by the respective wiring portions of the first spiral wiring pattern and the second spiral wiring pattern are reduced, and the first spiral wiring pattern and the first spiral wiring pattern Heat generated in the two spiral wiring pattern can be dissipated more effectively. Further, in the region where the planar voice coil of the flexible substrate is formed, the other wiring portion reinforces the portion between one line of the first spiral wiring pattern and the second spiral wiring pattern. Strength can be effectively maintained.

  In the diaphragm unit according to the present invention, a first extension portion of the first spiral wiring pattern and a second extension portion of the second spiral wiring pattern are formed through a through hole formed in the flexible base material. And can be electrically connected.

  With such a configuration, the first spiral wiring pattern and the second spiral wiring pattern formed on both surfaces of the flexible substrate are electrically connected via the first extension portion and the second extension portion, respectively. A planar voice coil in which the first spiral wiring pattern and the second spiral wiring pattern are connected in series to the flexible substrate can be formed.

  In the diaphragm unit according to the present invention, at least one of the first extension portion and the second extension portion has an area larger than each area of the first outer terminal portion and the second outer terminal portion. be able to.

  With such a configuration, at least one of the first extension portion and the second extension portion following the inner line ends of the first spiral wiring pattern and the second spiral wiring pattern of the planar voice coil is the first spiral wiring. Since it is wider than the first outer terminal portion and the second outer terminal portion that follow the outer line ends of the pattern and the second spiral wiring pattern, at least one of the relatively wide first extension portion and second extension portion causes a planar voice. As the coil is reinforced, the heat generated by the planar voice coil can be dissipated more effectively.

  Further, in the diaphragm unit according to the present invention, at least one of the first extension portion and the second extension portion is disposed in the innermost area of the corresponding spiral wiring pattern, and the connection portion is arranged in the innermost area. The area may be larger than the other areas.

  With such a configuration, at least one of the first extension portion and the second extension portion following the inner line ends of the first spiral wiring pattern and the second spiral wiring pattern of the planar voice coil corresponds to the corresponding spiral wiring. Since the innermost region of the pattern is wider than the other portions, the planar voice coil is reinforced by a wider extension portion following at least one inner wiring end of the first spiral wiring coil and the second spiral wiring coil. The heat generated by the planar voice coil can be effectively dissipated.

  Furthermore, in the diaphragm unit according to the present invention, a gap between the extended portion arranged in the innermost region of the spiral wiring pattern and the innermost wiring surrounding the innermost region of the spiral wiring pattern is the spiral shape. It can be set as the structure substantially the same as the width | variety between lines in a wiring pattern.

  With such a configuration, the innermost region of the spiral wiring pattern (at least one of the first spiral wiring pattern and the second spiral pattern) of the planar voice coil is occupied by the substantially expanded portion. The planar voice coil is reinforced by the wider extension part following the inner wiring end of at least one of the spiral wiring coil and the second spiral wiring coil, and heat generated in the planar voice coil can be effectively dissipated. .

  A speaker device according to the present invention includes any one of the above-described diaphragm units and a magnetic circuit in which a magnetic gap is formed, and a planar voice coil formed in the diaphragm unit is disposed in the magnetic gap. The diaphragm unit and the magnetic circuit unit are relatively arranged so that the diaphragm vibrates due to an interaction between a magnetic field generated from the magnetic circuit unit and an audio signal current supplied to the planar voice coil. It becomes the composition to do.

  With such a configuration, the planar voice coil is reinforced by the extension formed subsequent to the inner wiring end of the spiral wiring pattern, and heat generated in the planar voice coil of the spiral wiring pattern is effectively dissipated. A first spiral wiring pattern and a second spiral wiring pattern are formed on both surfaces of a flexible base material as a speaker device using a diaphragm unit or a planar voice coil, and the first spiral wiring Each wiring part of the pattern and the second spiral wiring pattern does not heat the same part of the flexible substrate from both sides, and heat generated in the first spiral wiring pattern and the second spiral wiring pattern is generated. In the region where the planar voice coil of the flexible substrate is formed, the first spiral wiring pattern and the second spiral shape can be more effectively dissipated. It can be one line between portions of the line pattern and the other wiring parts to realize a speaker apparatus using the diaphragm unit so as to reinforce.

  According to the diaphragm unit of the present invention, the planar voice coil is reinforced by the relatively wide extension formed subsequent to the inner wiring end of the spiral wiring pattern, and the planar voice coil of the spiral wiring pattern is used. Since the generated heat can be effectively dissipated, or when the first spiral wiring pattern and the second spiral wiring pattern are formed on both surfaces of the flexible substrate as a planar voice coil, The portions that are heated from both surfaces of the flexible substrate by the respective wiring portions of the first spiral wiring pattern and the second spiral wiring pattern are reduced, and are generated in the first spiral wiring pattern and the second spiral wiring pattern. Heat can be dissipated more effectively, and in the region of the flexible substrate where the planar voice coil is formed, the first spiral wiring pattern and the second Since one line between parts of the winding-like wiring pattern and the other wiring parts will be reinforced, without particularly large thickness, it is possible to further increase the strength and heat dissipation effect.

  In addition, according to the speaker device of the present invention, since the diaphragm unit that can increase the strength and the heat dissipation effect without increasing the thickness is used, it is possible to increase the output while maintaining the thin shape. Can be planned.

It is sectional drawing which shows typically the basic composition of the speaker apparatus using the diaphragm unit which concerns on the 1st Embodiment of this invention. It is a top view which shows the structural example of the planar voice coil (spiral wiring pattern) formed in a diaphragm unit. It is sectional drawing which shows the cross section in the A line of the diaphragm unit shown to FIG. 2A. It is a figure which shows the example of arrangement | positioning of the terminal of the planar voice coil formed in the diaphragm unit. It is sectional drawing which shows the relationship between the magnetic gap at the time of forming a terminal inside a planar voice coil, and the solder ball formed in the terminal. It is a top view which shows the other structural example of the planar voice coil (spiral wiring pattern) formed in a diaphragm unit. It is a top view which shows typically the structural example of the 1st spiral wiring pattern which comprises the planar voice coil formed in the diaphragm unit which concerns on the 2nd Embodiment of this invention. It is a top view which shows typically the structural example of the 2nd spiral wiring pattern which comprises the planar voice coil formed in the diaphragm unit which concerns on the 2nd Embodiment of this invention. FIG. 7 is a plan view showing the first spiral wiring pattern and the second spiral wiring pattern shown in FIGS. 5 and 6 in an overlapping manner. It is sectional drawing which shows the cross section of the diaphragm unit which concerns on the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The basic configuration of the speaker device having the diaphragm unit according to the first embodiment of the present invention is as shown in FIG. FIG. 1 schematically shows the basic configuration of the speaker device.

  In FIG. 1, the speaker device has a structure in which both ends of the diaphragm unit 10 are supported by a frame 30. One end portion of the diaphragm unit 10 is elastically supported by dampers 31 and 32 accommodated in the accommodating portion 30 a of the frame 30, and the other end portion of the diaphragm unit 10 is fixedly supported by a support portion 33 of the frame 30. . A magnetic circuit 20 is provided in the vicinity of the accommodating portion 30 a of the frame 30. The magnetic circuit 20 includes a magnet 21, a lower yoke 22, and an upper yoke 23. A magnetic gap Gp is formed between the magnet 21, the lower yoke 22, and the upper yoke 23 between the lower yoke 22 and the upper yoke 23. Is integrated. The diaphragm unit 10 is formed with a planar voice coil 13 as will be described later. The diaphragm unit 10 is supported by the frame 30 so that the planar voice coil 13 is positioned within the magnetic gap Gp of the magnetic circuit 20. Yes.

  The diaphragm unit 10 on which the planar voice coil 13 is formed is configured as shown in FIGS. 2A and 2B. 2A shows in detail the structure of the planar voice coil 13 formed in the diaphragm unit 10, and FIG. 2B shows a cross section taken along line A of the diaphragm unit shown in FIG. 2A.

  2A and 2B, a planar voice coil 13 serving as a spiral wiring pattern is formed on the surface of a rectangular flexible substrate (flexible base material) 11. A resist layer 12 is formed on the surface of the flexible substrate 11 so as to cover the planar voice coil 13. FIG. 2A shows the planar voice coil 13 formed on the surface of the flexible substrate 11 in a state of being transmitted through the resist layer 12.

  A rectangular outer terminal portion 15 is formed following the outer wiring end 132 of the planar voice coil (suitably referred to as a spiral wiring pattern) 13, and an extension portion 14 is formed following the inner wiring end 133 of the spiral wiring pattern 13. Is formed. The extended portion 14 has an area larger than the area of the outer terminal portion 15 and has a size that substantially covers the innermost region 130 of the spiral wiring pattern 13. Specifically, the gap Δ between the extended portion 14 and the innermost wiring 131a, 131b, 131c surrounding the innermost region 130 of the spiral wiring pattern 13 (for example, the gap between the extended portion 14 and the innermost wiring 131b in FIG. 2B). The extension portion 14 is formed in the innermost region 130 so that (see Δ) is substantially the same as the line width Δ in the spiral wiring pattern 13 (see FIG. 2B).

  An inner terminal window 121 that exposes a rectangular region in the vicinity of the inner wiring end 133 of the spiral wiring pattern 13 of the extension portion 14 is formed in the resist layer 12 that covers the flexible substrate 11, and the extension portion exposed from the inner terminal window 121. Fourteen rectangular regions are used as the inner terminal portion 14a. The resist layer 12 is formed with an outer terminal window 122 that exposes the outer terminal portion 15. By applying an audio signal between the inner terminal portion 14a and the outer terminal portion 15 of the extended portion 14 exposed from the inner terminal window 121 and the outer terminal window 122 of the resist layer 12, a spiral pattern 13 (planar voice coil). An audio signal current flows through.

  When the diaphragm unit 10 having the structure as described above is set on the frame 30, the spiral wiring pattern 13 is covered by the magnetic circuit 20 (upper yoke 23) as shown in FIG. 3A. At this time, the outer terminal portion 15 exposed from the outer terminal window 122 of the resist layer 12 is disposed outside the magnetic gap Gp in the magnetic circuit 20, but the extended portion 14 exposed from the inner terminal window 121 of the resist layer 12. The inner terminal portion 14a is covered with the magnetic circuit 20 and disposed in the magnetic gap Gp. For this reason, as shown in FIG. 3B, a recess 23a is formed in a portion of the upper yoke 23 facing the inner terminal portion 14a, and the solder ball 16 and the upper yoke 23 when the audio signal line is soldered to the inner terminal portion 14a. To prevent interference. In this way, the magnetic gap Gp formed between the lower yoke 22 and the upper yoke 23 can be set narrower by the spacers 24a and 24b, and the magnetic flux crossing the planar voice coil 13 (spiral wiring pattern). The density can be increased.

  In the speaker device according to the first embodiment, an audio signal is applied between the outer terminal portion 15 and the inner terminal portion 14a of the planar voice coil 13 (spiral wiring pattern), and the audio signal current is applied to the planar voice coil 13. , A force corresponding to the audio signal current acts on the planar voice coil 13 due to the interaction between the audio signal current flowing through the planar voice coil 13 and the magnetic field generated by the magnetic circuit 20. As a result, the reciprocating motion (in the horizontal direction indicated by the arrow H in FIG. 1) from the portion elastically supported by the dampers 31 and 32 of the diaphragm unit 10 to the portion where the planar voice coil 13 is formed is performed. Due to this reciprocation, the diaphragm unit 10 having the other end fixedly supported by the support portion 33 of the frame 30 vibrates. The vibration corresponding to the music signal current of the diaphragm unit 10 is output as sound (air vibration).

  In the diaphragm unit 10, the extended portion 14 that is wider than the outer terminal portion 15 following the outer wiring end 132 of the spiral wiring pattern of the planar voice coil 13 and further covers the entire innermost region 130 of the spiral wiring pattern. Is formed following the inner wiring end 133 of the spiral wiring pattern, so that the planar voice coil 13 (spiral wiring pattern) is reinforced by the extended portion 14 having a large area. Thereby, even if a large force acts on the area where the planar voice coil 13 of the diaphragm unit 10 is formed by increasing the output, the area does not bend in the magnetic gap Gp. The reciprocating motion can be reliably performed according to the audio signal current.

  In addition, the extended portion 14 having a large area following the inner wiring end 133 of the spiral wiring pattern is not the shortest current path, and no current flows therethrough. Therefore, the wide extension portion 14 can effectively dissipate heat generated by the planar voice coil 13 (each wiring of the spiral wiring pattern) without being affected by the magnetic field from the magnetic circuit 20.

  As described above, according to the diaphragm unit 10 according to the first embodiment of the present invention, the wide extension portion 14 formed subsequent to the inner wiring end 133 of the spiral wiring pattern of the planar voice coil 13 causes a flat surface. Since the voice coil 13 is reinforced and the heat generated in the planar voice coil 13 can be effectively dissipated, the strength and the heat radiation effect can be increased without increasing the thickness. become able to. According to the speaker device using such a diaphragm unit 10, the strength and heat dissipation effect of the diaphragm unit 10 can be further increased without particularly increasing the thickness. Output can be achieved.

  The extended portion 14 formed subsequent to the inner wiring end 133 of the spiral wiring pattern of the planar voice coil 13 may not be wide enough to substantially cover the entire innermost region 130 of the spiral wiring pattern. For example, as shown in FIG. 4, the expanded portion 14 ′ formed in the innermost region 130 of the spiral wiring pattern of the planar voice coil 13 has an area larger than that of the other portion 130 a in the innermost region 130. Can be big.

  The extended portion 14 formed following the inner wiring end 133 of the spiral wiring pattern usually has an area used as a terminal portion, for example, an area larger than the area of the outer terminal portion 15. By the portion larger than the terminal portion, it becomes possible to obtain the reinforcement and heat dissipation effect corresponding to the size.

  Next, a diaphragm unit according to a second embodiment of the present invention will be described. This diaphragm unit is different from the diaphragm unit 10 according to the first embodiment described above in that spiral wiring patterns are formed on both surfaces of a flexible substrate (flexible base material).

  The diaphragm unit according to the second embodiment of the present invention is configured as shown in FIGS. 5 is a plan view schematically showing a configuration example of the first spiral wiring pattern constituting the planar voice coil formed in the diaphragm unit, and FIG. 6 is a plan view formed in the diaphragm unit. FIG. 7 is a plan view schematically showing a configuration example of a second spiral wiring pattern constituting the voice coil, and FIG. 7 shows the first spiral wiring pattern and the second spiral wiring pattern shown in FIGS. 5 and 6. FIG. 8 is a cross-sectional view showing a cross section of the diaphragm unit.

  5 and 8, the diaphragm unit 50 includes a rectangular flexible substrate 51 (flexible base material). A first spiral wiring pattern 53 is formed on one surface of the flexible substrate 51, and a first resist layer 52 is formed on the surface of the flexible substrate 51 on which the first spiral wiring pattern 53 is formed. FIG. 5 shows a first spiral wiring pattern 53 formed on one surface of the flexible substrate 51 in a state of being transmitted through the first resist layer 52. Similarly to the diaphragm unit 10 according to the first embodiment, the first spiral pattern 53 is formed with the first outer terminal portion 55 following the outer wiring end and following the inner wiring end. Thus, a first extension portion 54 (see FIG. 8) is formed.

  6 and 8, the second spiral wiring pattern 63 is formed on the other surface of the flexible substrate 51, and the second resist layer 62 is formed on the surface of the flexible substrate 51 on which the second spiral pattern 63 is formed. Is formed. 6 shows a second spiral pattern 63 formed on the surface of the flexible substrate 51 opposite to the surface on which the first spiral wiring 53 is formed in a state where the first resist layer 52 and the flexible substrate 51 are transmitted. Is shown. In the second spiral pattern 63, as in the case of the diaphragm unit 10 according to the first embodiment, a second extended portion 64 (see FIG. 8) is formed following the inner wiring end.

  As shown in FIG. 8, the first spiral wiring pattern 53 and the second spiral wiring pattern 63 are arranged such that the first extension portion 54 and the second extension portion 64 face each other with the flexible substrate 51 interposed therebetween. ing. A through hole 56 is formed in a portion of the flexible substrate 51 corresponding to the first extension portion 54 and the second extension portion 64, and the first extension portion 54 and the second extension portion 64 are electrically connected via the through hole 56. It is connected to the. Accordingly, the first spiral wiring pattern 53 and the second spiral wiring pattern 63 are connected in series, and the two spiral wiring patterns 53 and 63 constitute a single planar voice coil.

  Further, as shown in FIGS. 6 and 7, a through hole 66 is formed in a portion corresponding to the outer wiring end of the second spiral wiring pattern 63 of the flexible substrate 51, and the first spiral wiring of the flexible substrate 51 is formed. A second outer terminal portion 65 is formed in a portion adjacent to the through hole 66 on the surface on which the pattern 53 is formed. The outer wiring end of the second spiral wiring pattern 63 is electrically connected to the second outer terminal portion 65 through the through hole 66. Thereby, when an audio signal is applied between the first external terminal portion 55 and the second external terminal portion 65, an audio signal current is connected in series between the first external terminal portion 55 and the second external terminal portion 63. It flows through the first spiral wiring pattern 53 and the second spiral wiring pattern 63. The winding direction of each of the first spiral wiring pattern 53 and the second spiral wiring pattern 63 is set so that the audio signal current flows in the same direction when viewed from one surface of the flexible substrate 51. .

  Further, the first spiral wiring pattern 53 and the second spiral wiring pattern 63 formed on both surfaces of the flexible substrate 51 are arranged so that the wiring portion and the inter-line portion face each other with the flexible substrate 51 interposed therebetween. Yes. Specifically, as shown in FIG. 8, the inter-line portion between the wiring portion 531 and the wiring portion 532 of the first spiral wiring pattern 53 and the wiring portion 632 of the second spiral wiring pattern 63 are flexible substrates. 51, and the inter-line portion between the wiring portion 631 and the wiring portion 632 of the second spiral wiring pattern 63 and the wiring portion 531 of the first spiral wiring pattern 63 sandwich the flexible substrate 51. Are facing each other.

  In addition, as shown in FIG. 8, the terminal window 522 is formed in the site | part corresponding to the 1st outer terminal part 55 of the 1st resist layer 52 which covers the surface of the flexible substrate 51 in which the 1st spiral wiring pattern 53 is formed. The first outer terminal portion 55 is exposed. A solder ball 58 for soldering the audio signal line to the first outer terminal portion 55 exposed from the terminal window 522 is formed. Although not shown, a terminal window is also formed at a portion corresponding to the second outer terminal portion 65 of the first resist layer 52, and the second outer terminal portion 65 is exposed from the terminal window. 2 The audio signal line is soldered to the external terminal portion 65.

  As shown in FIG. 7, the diaphragm unit 50 having the above-described structure is a planar voice constituted by a first spiral wiring pattern 53 and a second spiral wiring pattern 63 formed so as to overlap both surfaces of the flexible substrate 51. The coil is set on the frame 30 so as to be disposed in the magnetic gap Gp of the magnetic circuit 20 (see FIG. 1). In this state, both the first outer terminal portion 55 and the second outer terminal portion 65 are disposed outside the magnetic gap Gp of the magnetic circuit 20. Thereby, the magnetic gap Gp can be set narrower without the solder balls formed on the first outer terminal portion 55 and the second outer terminal portion 65 interfering with the magnetic circuit 20.

In the speaker device configured as described above, an audio signal is applied between the outer terminal portion 55 and the second outer terminal portion 65 of the planar voice coil (the first spiral wiring pattern 53 and the second spiral wiring pattern 63). When an audio signal current flows through the planar voice coil, the first signal is generated by the interaction between the audio signal current flowing through the first spiral wiring pattern 53 and the second spiral wiring pattern 63 and the magnetic field generated in the magnetic circuit 20. A force corresponding to the audio signal current acts on the spiral wiring pattern 53 and the second spiral wiring pattern 63 (planar voice coil). As a result, reciprocating motion (in the left-right direction indicated by arrow H in FIG. 1) from the portion elastically supported by the dampers 31 and 32 of the diaphragm unit 50 to the portion where the planar voice coil is formed is performed. Due to this reciprocation, the diaphragm unit 50 whose other end is fixedly supported by the support portion 33 of the frame 30 vibrates. Vibration corresponding to the music signal current of the diaphragm unit 50 is output as sound (air vibration).

  In the diaphragm unit 50, the first spiral wiring pattern 53 and the second spiral wiring pattern 63 formed on both surfaces of the flexible substrate 51 are arranged such that the wiring portion and the interline portion face each other with the flexible substrate 51 interposed therebetween. (Refer to FIG. 8), the portions of the first spiral wiring pattern 53 and the second spiral wiring pattern 63 that are heated from both surfaces of the flexible substrate 51 are reduced, and the first spiral wiring Heat generated in the pattern 53 and the second spiral wiring pattern 63 can be dissipated more effectively. Moreover, in the area | region in which the planar voice coil of the flexible substrate 51 was formed, since the other wiring part comes to reinforce one line part of the 1st spiral wiring pattern 53 and the 2nd spiral wiring pattern 63, Strength can be effectively maintained.

  As described above, according to the diaphragm unit 50 according to the second embodiment of the present invention, the first spiral wiring pattern 53 and the second spiral wiring pattern 63 are heated from both surfaces of the flexible substrate 51 by the wiring portions. Therefore, the heat generated in the first spiral wiring pattern 53 and the second spiral wiring pattern 63 can be dissipated more effectively, and the planar voice coil (first electrode) of the flexible substrate 51 can be dissipated. In the region where the first spiral wiring pattern 53 and the second spiral wiring pattern 63) are formed, one of the first spiral wiring pattern 53 and the second spiral wiring pattern 63 is reinforced by the other wiring portion. Thus, the strength and heat dissipation effect can be further increased without particularly increasing the thickness. According to the speaker device using such a diaphragm unit 50, the strength and heat dissipation effect of the diaphragm unit 50 can be further increased without particularly increasing the thickness. Output can be achieved.

  The first extension portion 54 and the second extension portion 64 are the outermost portions of the first spiral wiring pattern 53 and the second spiral wiring pattern 63, as in the case of the diaphragm unit 10 according to the first embodiment. It is formed so as to cover the inner region (see FIG. 2). Thereby, similarly to the case of the diaphragm unit 10 according to the first embodiment, the strength and heat dissipation effect of the diaphragm unit 50 are further increased.

  However, as described above, the first spiral wiring pattern 53 and the second spiral wiring pattern 63 formed on both surfaces of the flexible substrate 51 face each other with the wiring portion and the line-to-line portion sandwiching the flexible substrate 51. In the arrangement, a relatively high strength and a heat dissipation effect can be obtained depending on the configuration. Therefore, the first extension portion 54 and the second extension portion 64 have the first spiral wiring pattern 53 and the second spiral. In the innermost region of the wiring pattern 63, a width that is wider than other portions, a width that is wider than the outer terminal portions 55 and 65, or a width that is the same as the outer terminal portions 55 and 65 Furthermore, the width can be set to a size that can be connected to each other by the through hole 56, and any size can be used.

  In the above-described example, the first spiral wiring pattern 53 and the second spiral wiring pattern 63 are connected in series through the through hole 56, but they are connected in parallel. Even if it exists, it may be independent.

  As described above, the diaphragm unit according to the present invention has an effect that the strength and the heat radiation effect can be further increased without particularly increasing the thickness, and is provided on the surface of the flexible substrate. It is useful as a diaphragm unit in which a planar voice coil serving as a spiral wiring pattern is formed, and can be applied to a high-power thin speaker device.

10 Diaphragm unit 11 Flexible substrate (flexible base material)
12 resist layer 121 inner terminal window 122 outer terminal window 13 planar voice coil (spiral wiring pattern)
130 innermost region 131a, 131b, 131c innermost wiring 132 outer wiring end 133 inner wiring end 14, 14 'expansion portion 14a inner terminal portion 15 outer terminal portion 16 solder ball 20 magnetic circuit 21 magnet 22 lower yoke 23 upper yoke 24a, 24b Spacer 30 Frame 30a Housing part 31, 32 Damper 33 Support part 50 Diaphragm unit 51 Flexible substrate (flexible base material)
52 1st resist layer 53 1st spiral wiring pattern 54 1st expansion part 55 1st outer terminal part 56 through hole 58 solder ball 62 2nd resist layer 63 2nd spiral wiring pattern 64 2nd expansion part 65 2nd outside Terminal part 66 Through hole

Claims (10)

A diaphragm unit in which a planar voice coil that forms a spiral wiring pattern is formed on the surface of a flexible substrate,
An outer terminal portion formed following the outer wiring end of the spiral wiring pattern;
A diaphragm unit having an extended portion formed subsequent to the inner wiring end of the spiral wiring pattern and having an area larger than the area of the outer terminal portion. A diaphragm unit in which a planar voice coil that forms a spiral wiring pattern is formed on the surface of a flexible substrate,
An outer terminal portion formed following the outer wiring end of the spiral wiring pattern;
An extension formed following the inner wiring end of the spiral wiring pattern;
The expansion unit is a diaphragm unit that is disposed in an innermost region of the spiral wiring pattern, and in the innermost region, an area of the expansion unit is larger than an area of other portions.   The diaphragm unit according to claim 1, wherein the extension portion is an inner terminal portion that is paired with the outer terminal portion of the planar voice coil.   The diaphragm unit according to claim 2, wherein a gap between the extended portion and the innermost wiring surrounding the innermost region of the spiral wiring pattern is substantially the same as a line width in the spiral wiring pattern. A diaphragm unit in which a planar voice coil is formed on the surface of a flexible substrate,
The planar voice coil includes a first spiral wiring pattern formed on one surface of the flexible substrate,
And having a second spiral wiring pattern formed on the other surface of the flexible substrate,
A first outer terminal portion formed following an outer wiring end of the first spiral wiring pattern;
A first extension formed following an inner wiring end of the first spiral wiring pattern;
A second outer terminal portion formed following the outer wiring end of the second spiral wiring pattern;
A second extension formed following the inner wiring end of the second spiral wiring pattern;
The first spiral wiring pattern and the second spiral wiring pattern are vibration plate units arranged so that a wiring portion and a line-to-line portion face each other with the flexible base material interposed therebetween.   The first extension portion of the first spiral wiring pattern and the second extension portion of the second spiral wiring pattern are electrically connected via a through hole formed in the flexible base material. 5. The diaphragm unit according to 5.   The diaphragm unit according to claim 5 or 6, wherein at least one of the first extension part and the second extension part has an area larger than the area of each of the first outer terminal part and the second outer terminal part.   6. At least one of the first extension part and the second extension part is disposed in an innermost area of a corresponding spiral wiring pattern, and an area of the connection part is larger than the other area in the innermost area. Or the diaphragm unit of 6.   A gap between the extension portion arranged in the innermost area of the spiral wiring pattern and the innermost wiring surrounding the innermost area of the spiral wiring pattern is substantially the same as the line width in the spiral wiring pattern. The diaphragm unit according to claim 8. The diaphragm unit according to any one of claims 1 to 9,
A magnetic circuit having a magnetic gap formed thereon,
The diaphragm unit and the magnetic circuit are relatively arranged so that a planar voice coil formed in the diaphragm unit is arranged in the magnetic gap,
A speaker device in which the diaphragm vibrates due to an interaction between a magnetic field generated from the magnetic circuit and an audio signal current supplied to the planar voice coil.

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